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MRSN
Mersana Therapeutics
MRSN
MRSN
Delisted
MRSN was delisted on the 5th of January, 2026.
108 hedge funds and large institutions have $30.2M invested in Mersana Therapeutics in 2025 Q1 according to their latest regulatory filings, with 28 funds opening new positions, 22 increasing their positions, 31 reducing their positions, and 48 closing their positions.
New
Increased
Maintained
Reduced
Closed
140% more call options, than puts
Call options by funds: $12K | Put options by funds: $5K
0.56% less ownership
Funds ownership: 3.38% → 2.82% (-0.56%)
16% less funds holding
Funds holding: 128 → 108 (-20)
29% less repeat investments, than reductions
Existing positions increased: 22 | Existing positions reduced: 31
42% less first-time investments, than exits
New positions opened: 28 | Existing positions closed: 48
80% less capital invested
Capital invested by funds: $149M → $30.2M (-$119M)
100% less funds holding in top 10
Funds holding in top 10: 1 → 0 (-1)
Holders
108
Holders Change
-20
Holders Change %
-15.63%
% of All Funds
1.45%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
28
Increased
22
Reduced
31
Closed
48
Calls
$12K
Puts
$5K
Net Calls
+$7K
Net Calls Change
+$1.68M
Top Buyers
Top Sellers
| 1 |
EC
EcoR1 Capital
San Francisco,
California
|
-$16.2M |
| 2 |
NHAS
Novo Holdings A/S
Hellerup,
Denmark
|
-$6.08M |
| 3 |
VA
VR Adviser
New York
|
-$4.13M |
| 4 |
BCM
Boxer Capital Management
San Diego,
California
|
-$3.77M |
| 5 |
ACP
Acuta Capital Partners
Redwood City,
California
|
-$1.6M |
